With a split flap/aileron config I like the inner "flap" sections configured as flaperons on slow models. No air over the outboard ailerons can be a serious issue but inboard the prob flow provides enough. Having spoileron capability also allows my Tango (useless for much else) with Saito .82 to flat spin upwards Of course, you could just set up for CROW and mess around until you find combos you like